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International Tank Service specializes in designing, fabricating and building custom API 650 double wall storage tanks. We have built them as large as six million gallons. Think of a double wall storage tank as a tank within a tank. In addition to building API 650 double wall storage tanks we also preform API 653 inspections, API 653 Tank Repairs, and Modifications. We can even design and build your tank foundation.

Why build a double wall tank?

Need secondary containment and don’t have enough room for dike walls or an earthen dike

You are too close to a large body of water and cannot take the risk

You would like to safely encapsulate a potential spill and prevent your product from polluting land and water

Due to strict EPA guidelines on secondary containment you may need to build an API 650 double wall tank to get a building permit